In Normal, the cruise is set to the desired speed &,within reason, you can accelerate or brake as normal or electronically.However, on the M42, my cruise speed was reduced by 50% &,@ the flick of a switch,shot back to 100% which just surprised me @ the time.
Radar Cruise is much more gentle but the auto braking is a surprise when first experienced as the vehicle in front brakes sharply.
Still I averaged 30mg over a 230 mile trip to Cheltenham & the surrounding countryside which is excellent for a powerful V8.
Tel